/Engine/Source/Runtime/GeometryCore/Public/MatrixTypes.h
Computes |A|(A^-1)^T. This value is sometimes useful for computing rotated surface normals from a continuous deformation. Since computing the 3x3 inverse using Cramer's rule divides by the 3x3 determinant in the final step, this function avoids computing the determinant at all, since it would just cancel out.
[TMatrix3](API\Runtime\GeometryCore\TMatrix3)< RealType > DeterminantTimesInverseTranspose() const